June 20, 2010
June 20, 2010
June 23, 2010
15.267.1 - 15.267.30
D. Composite truss member lay-up, summary project description
Author: Jean Koster, email@example.com
1. Overview 1.1. Overall goal Manufacture a unidirectional glass fiber-reinforced epoxy matrix strut with round cross- section that can sustain a theoretical load of 3500 lbs without failing.
1.2. Societal context/relevance In the quest for increased performance and fuel savings of all kinds of vehicles, which includes reduced weight and lower cost, current metallic alloys frequently have reached their limits. Composites, which are made of two or more constituents, proved promise to fulfill these requirements without jeopardizing safety.
1.3. Program integration The project is integrated into an introductory course on materials science which includes a few weeks of studies on composite materials. The strut design and manufacture may take 6 hours of laboratory and two hours of testing. Limitations may occur due to availability of tensile testing equipment.
1.4. Project description and scope The objectives of this lab were to design and fabricate (cast) a fiber reinforced strut, perform a tensile stress test, and obtain stress/strain data from the sample. The groups were expected to understand the effect of the number of fibers within the strut, the effect of cross sectional area ratios on the strength of the strut, and identify the challenges and difficulties in manufacturing a composite material.
1.5. Learning activities and tasks 1.5.1. Model the Modulus of elasticity of composites 1.5.2. Manufacture a composite strut 1.5.3. Prepare a strut for tensile testing 1.5.4. Operate tensile testing equipment 1.5.5. Analyze data
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